2013-03-272013-03-272011-02VALLINOTO, Antonio Carlos Rosário, et al. Characterization of mannose-binding lectin plasma levels and genetic polymorphisms in HIV-1-infected individuals. Revista da Sociedade Brasileira de Medicina Tropical. Uberaba, v. 44, n. 1, p. 1-3, jan./fev. 2011. Disponível em: <http://www.scielo.br/pdf/rsbmt/v44n1/01.pdf>. Acesso em: 25 mar. 2013. <http://dx.doi.org/10.1590/S0037-86822011000100001>.1678-98490037-8682https://repositorio.ufpa.br/handle/2011/3601INTRODUCTION: The present study investigated the association between mannose-binding lectin (MBL) gene polymorphism and serum levels with infection by HIV-1. METHODS: Blood samples (5mL) were collected from 97 HIV-1-infected individuals resident in Belém, State of Pará, Brazil, who attended the Special Outpatient Unit for Infections and Parasitic Diseases (URE-DIPE). CD4+ T-lymphocyte count and plasma viral load were quantified. A 349bp fragment of exon 1 of the MBL was amplified via PCR, using genomic DNA extracted from controls and HIV-1-infected individuals, following established protocols. MBL plasma levels of the patients were quantified using an enzyme immunoassay kit. RESULTS: Two alleles were observed: MBL*O, with a frequency of 26.3% in HIV-1-infected individuals; and the wild allele MBL*A (73.7%). Similar frequencies were observed in the control group (p > 0.05). Genotype frequencies were distributed according to the Hardy-Weinberg equilibrium in both groups. Mean MBL plasma levels varied by genotype, with statistically significant differences between the AA and AO (p < 0.0001), and AA and OO (p < 0.001) genotypes, but not AO and OO (p = 0.17). Additionally, CD4+ T-lymphocytes and plasma viral load levels did not differ significantly by genotype (p > 0.05). CONCLUSIONS: The results of this study do not support the hypothesis that MBL gene polymorphism or low plasma MBL concentrations might have a direct influence on HIV-1 infection, although a broader study involving a large number of patients is needed.engAcesso AbertoPolimorfismo genético MBLHIV-1Belém - PAPará - EstadoAmazônia brasileiraArtigo de Periódico